Burglar alarm



Patented ocr. 27, 192.5.

UNIT-151DN STATES PATENT oFF.IN.CE.

CARL F. l Lone,` or summer,` omo.

Application led March:24,' 1925. Serial No.17,942.

T all whom t may concern.:V i

VBe it known that I. CARL F. LoAR, 4a citizenof the United States, residingl at Sunbury, inthe `county of Delaware and State of Ohio, have invented certain new and useful Improvements in a Burglar' Alarm of which theafollowing'is a speei. lication.

The present invention relates to aburglar alarnnand aims to provide a novel and improved device of this character which may be readily and convenientlyattached to a door for etlic-iently sounding an `ala-rm to indicate that the' door has'been opened.

Afurtlier object of the invention is the provision oit-a spiral spring` adapted ytoA be wound `for operating `or soundingran alarm upon the opening of a door,` the device hav ing means forAV engaging between the edge ofthe door andthefaeing strip ofa` door frame for ypreventing operation of the springniotor while the door is'in a closed position, the 'device alsohaving a member arrangedlfor engaging -said 4means positioned between thedoorand.` door framefor preventing operationi ofthe alarm independent ofthe position ofthe door.

lt is also `an object of thee'invention'to providea burglar alarm of the kind indi catech which `is simple and substantial in construction, which can be manufactured economically, anduvhich willbe thoroughly efficient and practical 2in use. i f

lVith the foregoing aridother` objects in view, which will'beapparent as the def scription proceeds, the invention resides vin the construction andV arrangement of parts,

as hereinafter described and claimed, `it be-` ing understood that' changesr `can `'be made within `the scope' 'of what is claimed with- 'outj departing `from the spirit" ofl the-invention The invention is illustratedfintheaocflnnpanyingf drawings, lwherein c Figure 111s a@fragmentaryelevation ofl a doorfanda door iframe', 'showing my improved device applied,`

"Figure 2 is` a: sectionatalren on line 2 2 Figure Susi a sectionftalrenbnwlinenf- `of Figure v2,

Figure lis av fragmentaryhorizontalzsec* f tion taken-on lineetel, ofi` Figure Seand Eiguref 5 'is a" fragmentary @section-iy show- `ingi ai manner in Vwhich the devicefv may 1loe 1 attached to a door,

- said opiates.

Referring tothe drawings the numerallOv designates aportion of a door frame hingedly connected, :as at 1l, for ypivotally supe porting a door 12, which iszshown for illus-V trating tliemanner in which any improved device may: be applied toadoor. Inrcarrying out the invention, the-numeral 13 indie entes a mainbodyfplate having' `azpairwof parallel spaced extension inembersla` carried, at one -end thereof, which 4have their free ends bent atl right angles,.asi-au15,l for engaging between the edge of` the doorI l2 andthe door framelO. rOntheiinner-.face of theeangul'arly bent portions-.15am provided small prongs 1G` whichiare adapted to be forced' into the edge offthe door. V`At' the opposite end from that which-'saidilextensions 14: are provided-on the1vplate`13 -is` provided another pair ofparallelr spaced extensions 17` arrangedi for'supportingfa rubber suction cup18,said1-rubber suction cup 18 `having a reduced neck 119,1into which the extensions 17 entendV and 'ahead20ffor engagingover portions of -the--outera.sur-

facesV ofsaid extensions. Hingedly connected to the freeA end of one ofthe eX-tensionsi 17` -is a small 'plate 21'carryingia1prong 22 which is adapted"to-ibeforced fintofithe `side of the door shouldthe--surfaee `of Sthe .door-be rougherirregular softhat the-snc- `tionfeup 18Lwill'inotwhold Athedevice ina rigid mannerrto thedoor. p

*Supportedin aepaced position from the plate 13 is another plate 24 smaller in size thantheiplate 13" andlheld insuch;` spaced position byiz angled supporting: members .25, the opposite ends'vof` which y areattached fto Pivotallyi mounted centrally of the plates 13 and 24 fis: a ,shaft-,I26frto `which is lsecured one'rend of awsp'i-ral spring 27 `which in turn-has its opposite.. end, at-

taehed" to a` stationary shaft-28 `supported between't` said plates lf3V andy 24:. Secured :to the rotatable:f shaft-526` 4adjacent.E the lspring Y27 is a` geary29lmeshing with a gsm'all gear 30 carried 'by another shaft .31 which i's also pivotallyrf,supported :betweenl thegiplates `13 andV L24. I'IheV shaft 31 also lthassecured thereto anothenby gear;` 32 which .1 engage/sn a 1 doubler aetionzzpawl; 3S: afer. alternately 4 turn ing` I the Esame on: :its-f pivot. Securedftogthe l y ierlk arrangedforv.striking a bell Bovino itedwon lthe l shaft y26 1 and :arranged ,about :the 1 plate 24. '1 The outer end:` of ithe slraftc26 -is .f screw attached thereto a. handle 37 arranged for rotating lthe shaft 26 in order to wind the spiral spring 27. Positioned onthe plate 13 is an angled member 38 having the arm 39 thereof arranged between the spaced angularly bent portions 15 of the extensions 14 for engaging betwe-en the edge of the door 12 and door frame 10 with the angled bent portions 15 of said extensions. The other arm 40l of the angled member 38 has a slot 41 provided therein through which extends a pin 42 carried by the plate 13 in order to support. the angled member' 38 in a manner that the same may slide upon the plate 13. One of the extensions 14 has its inner edge turned up to provide a guide for directing the sliding movement of the angled member 38, said guide engaging the edge of the angled member. Carried b y the free end of the arm 40 of the angled member' 38 is a V-shaped lug 44 for engaging between 'the teeth of the gear 32 in order to prevent rotation of said gear, when the angled member 38 is slid or positioned in an inward manner.

One side of the arm 4() of the angled member 38 is notched, as at 45, so as to provide a shoulder 46 to' be engaged by the end 47 of a lever 48 pivotally connected to the plate 13, as at 49. The lever 48 is arranged to be swung in a position to engage in the notch 45 so as to hold the angled member in a position with the V-shaped lug carried thereby received between the teeth of the gear 32. Secured to the plate 13 on the opposite side of the arm 4() of the angled member 38 from that carrying the lever 48 is oneI end of a leafspring 50, the opposite end of which engages the V-shaped lug 44 in order to normally hold the angled member 38 in a position outwardly of the plate 13. f

In operation, the device is attached to the door 12 by means of the suction cup 18 or prong 23 and the forcing of the prongs 1 6 into the edge of the door. then 1n this position the arm 39 of the angled member 38 is positioned between the edge of the door and the door frame. The spring 27 is then wound by rotating t-he handle 3T, the device being held against operation by the lug 44 engaging between the teeth Of the gear 32. The lever 48 is then swung on its pivot so as to disengage the notch 45 in the arm 40 of the` angled member l38 which permits 'said angled member 'to move slightly rearwardly until the arm 39 of the angled member 38 engages the edge of the door frame, which movementis not suiiicient to permit the disengagement of the lug 44 from the gear 32. The device then-remains in this position while the door is closed, but upon opening the door the space between the same and the frame 10 is enlarged, which permits the angled member 38 to be movedoutwardly with relation to the plate 13, due to the 'spring 35, until lthe lug 44 haswdisengaged the teeth of the gear 32, which will permit the gear 32 to rotate in order that the double action pawl may be alternately turned which will cause the hammer to rapidly strike the bell 35 which will sound an alarm that may be readily heard.

Vhen it is desired thatl the alarm not be sounded when the door is opened the lever 48 is moved so as to engage in the notch 45 which will hold the lug 44 of the angled member 38 in engagement between the teeth of the gear 32 while. said lever 48 remains in such position so that the sounding of the alarm will not be effected during the opening of the door.

Having thus described my invention, what I claim as new is:

1. A burglar alarm in combination with a door and door frame, comprising a. plate, means for attaching said plate to the door, spring operated means carried by said plate for sounding an alarm, a member slidably mounted upon said plate one end of which is adapted to engage between the door and door frame, while the opposite end thereof engages said means for sounding said alarm to prevent operation thereof, spring means for moving said slidable member to disengage the same from said alarm so that the same may be sounded when the space between the door and door frame is increased by the opening of the door, and means adapted to engage said slidable memberfor holding the same against movement when desired.

2. A burglar alarm in combination with a door and door f "ame, comprising a plate, a pair of parallel spaced extensions formed on the opposite sides of the plate, a suction cup having a reduced neck received between one pair of arallel spaced extensions arranged for frictionally engaging the side 'of the door, the opposite pair of parallel spaced extensions having the free ends thereof bent at right angles and ext-ending between the door and door frame, prongs carried by the inner faces of said angular-ly bent port-ions for 'engaging into the door, a spring operated means for sounding an alarm carried by said plate, an angular member' slidably mounted on said plate with one arm thereof positioned between the parallel spaced ex tensions that are bent at right angles and between the door and door frame, means carried by said angular member'for engaging the means for soun-ding an alarm in order to prevent the sounding of said alarm when the door is closed, and spring means for moving said angular member to disengage the means carried thereby from the means for sounding an alarm when the space between the door and door frame is increased by the opening of the door.

3, A burglar ,alarm in 4Combination with a door and 'door frame, comprising a plate, a pair of parallel spaced extensions formed on the opposite ends of said plate, a rubber suction cup having a reduced neck adapted to be received between a pair of parallel spaced extensions in order to hold said suction cup in position in rictional engagement with a door, a lever pivotally connected to one. of the parallel spaced extensions supporting said rubber suction cup, a prong carried by said pivotally connected lever arranged to be forced into the door, the other of said pair ot parallel spaced extensions having the free ends thereof bent at right angles for extending between the door and door frame, means carried by the inner faces ot said angularly bent portions for engaging the door, an angular member slidably mounted on said plate, one portion of which is adapted to engage between the door and door trame and positioned between the right angularly bent portions, a spring operated means for sounding an alarm carried by said plate, and means carried by said angular member for engaging said means for sounding an alarm when the door is in a closed position, and spring means for moving said angular member to disengage the means carried thereby from the means ,tor sounding an alarm when the space between the door and door frame `is increased by the opening of the door.

el. A burglar alarm in combination with a door and door frame, comprising a plate, means for attaching said plate to a door, a pair ot' parallel spaced extensions formed on said plate, said extensions having the free ends thereof bent at right angles and extending between the door and 'door frame, an angled member having a slot in one arm thereof while the other arm is positioned between the bent portions oit the parallel spaced extensions and between the door and door frame, alpin carried by said plate and extending through said slot in said angular member, `an uptnrned tlange `formed on the inner edge ci one ot the parallel spaced extensions for acting as a guide for the slidable lnovement of the angled member on the plate, a spring operated means for sounding an alarm comprising a series of gears, a lag carried by said angled member for engaging between the teeth of one of the gears of said means for sounding an alarm to prevent the sounding of the alarm while the ldoor is in a closed position, and a leaf spring secured to said plate and having the free end thereof engaging said lug for moving the same away from the gear when the space between the door and door frame is increased by the opening of the door.

5. A burglar alarm in combination with a door and door frame, comprising a plate, means for attaching said plate to a door, a pair oit' parallel spaced extensions formed on said plate, said extensions having the free ends thereof bent at right angles and extending between the door and door frame, an angled member having a slot in one arm thereof while the other arm is positioned between the bent portions of the parallel spaced extensions and between the door and door frame, a pin carried by said plate and extending through said slot in said angular member, an upturned iange formed on the inner edge ot one of the parallel spaced extensions for acting as aA guide for the slidable movement of the angled member on the plate, a spring operated means for sounding an alarm. comprising a series of gears, a lug carried by said angled member for engaging between the teeth of one ot he gears of said means for sounding an alarm to prevent the sounding of the alarm while the door is in a closed position, a leaf spring secured to said plate and having the free end thereof` engaging said lug `for moving the same away from the gear when the space between the door and door trame is increased by the opening of the door, said angled member having a notch formedin one edge thereof, and a lever pivotally connected to said plate and adapted to be swung into said notch in said angled member tor preventing the disengagement ot the lug carried by the angled member from the gear of the means for sounding an alarm when said space is increased.

In testimony whereof, I have aiiixed my signature.

CARL F, LOARa 

